Elevator-door lock



Feb. '17. 1'925. 1 526.790

M. JAcoBsKY ELEVATOR DOOR LOCK Original Filed Feb. 24, 1923 Patented` Feb. 17, 1925.

UNITED STATES PATENT OFFICE.

MAXIM ancossxY, or NEW Yoan, n. Y.

ELEVAT'OB.-DOOR LO CK.

Original application filed February 24, 1923, Serial No. 620,912. Divided and this application filed October l23, 1923.

To all 'whom t may concern.' Y

Be it known that I, MAXIM Jncosnr, a citizen ot Poland, residing at New York, county o-l New York, and State oit New York, have invented certain new and useful Improvements in Elevator-Door Locks, of which the following is a specification.

This invention relates to improvements in locks, particularly locks intended for use with elevator doors as for instance described in my application Serial No. 620,912, filed Feb. 24, 1923, Patent No. 1,476,254 dated December 4, 1923, of which this application is a division, and it is the principal object `of my invention to provide a lock of this type which will automatically lock the ele? vator door in its closed position, thus preventing accidents. y

Another object of the invention is to provide a simple elevator door lock which is inexpensive to manufacture, durable, ano which can be readily attached to any elevator door now in common use.

Aim-ther object of the invention is to provide a lock which is also adapted for use with car doors, as for instance subway cars or the like, in short with doors of all descriptions.

A still further object of the invention is the provision of a lock allowing an adjustment of the operating parts to suit the vary.

ing measurement of the door jambs.V

It is also the object ot my invention to provide a readily and conveniently operating handle for opening the locked door .by an easy manipulation oi the handle.

These and other objects of my invention will beco-me more fully known the description thereof proceeds, and will thenbe specifically pointed out in the appended claims.

In theaccompanying drawings, forming a material part of this disclosure:

Figure 1 is a side elevation ot an elevator door lock constructed according to the present invention.

Figure 2 is a similar view of my lock with the cover removed and looking in the direction ot arrows `8--6 o1 Figure 4 with the lock in open position.

Figure 3 is a view similar to Figure 2 with the lool; in locking position.

Figure 4 is a longitudinal section through the lock on line 1010 ot Figure 2.

Figure 5 is a top plan view ot a locking base plate.

Serial No. 670,709.

Figure 6 is an end View thereof.

Figure 7 is a top plan View of a locking top plate.

`Figure 8 is an end view thereof.

Figure 9 isa cross-section on line 15--15 of Figure 2.

Figure 10 is a section on line 16-16 of Figure 1.

As illustrated the lock comprises a. casing 10 adapted to be secured to an elevator door and closed at its front by means of a cover plate 11 adapted to be attached to the casing by means of screws 12, 13, 14, 15 adapted to enter suitable holes in the corner pieces 16, 17, 16,V 19 in the'casing.

The cover plate 11 has a central opening 20 for the reception of the hand oi the operator for operating a finger grip or handle 21 pivotally secured at its lower end by means of a screw 22 entering a socket 23 in the casing.

Integrally made with the casing is a guide block 24 arranged at the upper end or one oit the edges oi' the casing and recessed as at 25 to guide a locking lat-ch 26 attached to the end of a rod 53 having a central fiat part 54 flattened in the opposite direction, while the inner end of rod is screw threaded as at 56 and enters an open channel 57 in corner piece 18 of casing 10.

A fiat plate 5S is slidably arranged upon the rear wall of the casing, and this plate carries on its upper face an abutment lug 59 in its left hand corner adapted to engage the iattened part 54 of rod 53 at one side, and an abutment lug 60 at some distance from its upper edge and appronimately in its center adapted to engage flat part ot rod 53 from the opposite side.

The plate 56 has the form illustrated in Figure 5, and carries at its lower right hand corner an upstanding flange 61 and a projecting pin 62, both for a purpose hereinafter more fully to be described.

Another plate 63 adapted to rest upon and slide on plate 58 has an upper shoulder.

posite t the side engaged byflug59, while lug 67 engages flat part 55 of rod 53 from a side opposite to the side engaged bylug its ends a head adapted to project through one of the edge walls of 4the casing, while its `opposite end slides 4inA al bore of corner piece 16 open at its end.

Intermediary yits endsY the rod 69 carrie's two spaced vcollars 71., 72, anda collar73 is arranged on head 70 within casing'flO, A spring 7l is wound around rod 69' between collar 72 and colla-r 73 and another spring 7 is wound around rod 69 between collar 7l and the inner edge of corner piece i6, both springs tend to press head 70 out ot casing 10.

A spider 76 is pivotallymounted on a hollow stem 77 projecting from the rearl wall ofthe casing' 10.` Qne arm, 78 'of"tl i e spider 76, has a socketon its loweij'face adapted to be engaged by pin 62, whilethe opposite ar1n7 9 of spider 6Y has a dependv ing socket on its lower face adapted to` be engaged by pin 68. th ird arm of the spider is angularly disposedto the other arms and'serves a purpose which will later more fullybe explained.

A handle plate 3l with an inner -dependQ ing ange 82 is pivotally resting-'upon the f upperend. of stem 77, and a screw. 83 isi holding the parts together. A lugf84t is at? tached to thelower face of spider. 76 and provided with .two dependingfngers. 85 and S6 adapted to enga-ge rod69, to both of its sides between collars 7 A72. A@Ylfrey holel 87 is'provide'd in the front plate through which the bit of ake'y may be inserted to engage flange 61 if it is desiredto operate the lock by a key.

The device operates as followsn` Il the operator closes the door, the head 70 will engage thekeep'er in the jamb ot the door and will be pressed inwardly against the action of springs y7st and'7 Thisoperation will operate, ling-ers 85 and 86 between collars 7l and'72 and turnrthe spider 76 to the underside of which the lingers are rigidly fastened.

Jfirm 7 8 of spider 76 will move upwardly, while arm79 Amoves downwardly, and as la A`1m 73 is connected to pin 62 of plate 58 andarm 79 to pin 68 of platel 63, plate 58 will be moved upwardly, while plate 63 will eXeeute a downward movement, and lue` .60ct plate 58 will engage the flat portion y5o'. (Fig.I :2) to rotate rod 53 and its latch 26 into locking position indicated in Figure l. This turning movement of rod 53 will be assiste-d during the simultaneous downward movement otplate 63 by its lug 67 engage ing'lxflait portion" 5 5' from the side opposite to the side engaged by lug 60 as both lugs are in" different planes and arranged to act at different times'.

If it is desired to open the door, the operator will manipulate the handle 81 by ,pressingthe sam-e towards the right so that its `a1ige 82 will engage arm 80 or" spider 7 @resulting in a turn of the spider toward the right, so thatarm 7 8 will go down and arm 79 will move upwardly. Plates 58and 63 will follow these movements with the result thatl lug 65 of platev 63 will engage the vflat portion 54C of rod 53r from one side, while lug 59 of plate 58 willV engagel it from theA opposite side although in a dilierentplane and the plate movements are so time-d that the downward movement ofpla'te 58 and the upward movementf'of plate 63 will rotate rod 53 and its'latch struction of the minor details of my in'vention without departing from the scope 'and' spirit thereof. v

Having thus described my invention, what I claimffasf ew,'a1i d'dfes'ire to secure by Lettersl Patent of the United' States is 1. A loclrcomprising laurotating'-locking member, a pair ot superpo'sed slidingv plates'. lugs on said plates adapted to engage' said locking. member to' rotate -thesaine into and, out of 'its lo'elring'position, m'ean's yfor sli'd-` ingsa-id'plates in ffopposite directions, a 'contact member adaptedto -operate said means to actuate saidplates to turn said 4locking member into locking position, a handle lr operating" said yplate sliding'g` lmeans to operate the plates to turn said locking member into Aits' normal unlocking position, and means for allowing an adjustment of said locking member to'su'it various door jamb construe-tions.

2. A lock vcomprising a rotatably arranged locking member, twoflattened parts on said member, a pair of sliding plates, one: under and the other above 'sa-id member, lugs on' the opposite inner faces of said 'plates soV arranged tc engage opposite'faces of said liattened parts to engage" the same 'upon the movements of said plates iu opposite directions fory turning said lool-:ing `member into and out of its'lo'cki'ngi posit n,a 1o tatably arranged spider, ari'ns on said lspider connected to said plates to actuatethesaine upon the actuation of said spider, a contact rod adapted to'actuate said spider to operate said plates and lugs thereonto rotate said locking member into locking position upon the actuation of said contact rod, another arm on said spider, a handle, a flange on said handle edge to engage said last named spider arm Jfor operating said spider and plates connected therewith to move the lugs thereon to rotate the locking member into its normal unlocking position, and means for allowing an adjustment of said locking member to suit various door jamb constructions.

3. A lock comprising a casing, a locking member rotatably arranged in said casing transversely thereto, a ,latch head on said member projecting vfrom said casing, means 'for varying the degree of projection to suit the varying door jamb construction, a spring controlled Contact member having a contact head projecting from said casing, collars on said rod, a spider, means on said spider to engage said collars to both sides of said rod for allowing an operation oic said spider upon the engagement or' said contact head by a door jamb, a means operated by said spider for rotating said locking member into and out of its looking position, and a hand operated handle for operating said spider to actuate said locking member rotating means to turn said latch head into its normal unlocking position.

4. A lock ofv the class described comprising a casing, a removable cover for said casing having a central opening, a hollow stem provided with an inner thread projecting from the rear wall of said casing through said cover, a spider rotatably secured to said stem, a flanged handle upon the extreme outer end of said stem, a screw engaged in said stem for keeping the parts together, two oppositely disposed arms on said s-pider, a pair of superposed sliding plates, projecting pins on said plates adapted to engage in sockets of said arms Jfor sliding said plates in opposte directions, a third arm on said spider adapted to be engaged by the flange l of said handle, a rotatable locking member, means on said plates adapted to engage said locking member to rotate the same upon the operation of said plates by said spider in and out of its locking position, an upstanding lla-nge on one of said plates, depending lugs on said spider, a Contact means adapted to engage said depending lugs for turning said spider into locking position when said contact member engages a door jamb and into unlocking position When said spider is operated by said handle.

In testimony Whereo1 I have atlixed my signature.

' MAXIM JACOBSKY. 

